Design study for transmission improvement of resonant surface plasmons using dielectric diffraction gratings.

نویسندگان

  • Seung Ho Choi
  • Sung June Kim
  • Kyung Min Byun
چکیده

A transmission-type surface plasmon resonance configuration with dielectric gratings regularly patterned on a silver film was investigated with the aim of enhancing the diffraction efficiency of radiative surface plasmons. The theoretical work was conducted using rigorous coupled-wave analysis in terms of first order diffraction efficiency and conversion efficiency (CE). The results show that pyramid gratings can produce a higher transmittance compared with other grating profiles. Design optimization of the pyramid grating at a wide range of grating thicknesses and periods resulted in a maximum transmittance that was larger than 77% and a peak CE of about 85%. This study demonstrates the potential of using transmitted surface plasmon waves in various optical devices, such as optical biosensors, optical imaging systems, and polarization filters.

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عنوان ژورنال:
  • Applied optics

دوره 48 15  شماره 

صفحات  -

تاریخ انتشار 2009